Specifications

28 AMD Geode™ GeodeROM Functional Specification

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32087C

02h

--- startTest/cpuRegInit CPU configuration registers initialize.

A9h UserCpuInit/

RestoreFromRam

Entering RestoreFromRam. Invalidate cache tags and clear GPE and PM1A

events.

AAh RestoreFromRam Clear ACPU_BIOS_ST event, set GPWIO0 active-low, prepare GPWIOs,

enable SCI generation and RTC wakeup.

ABh RestoreFromRam/memResume Call memResume.

ACh memResume Enter memResume.

ADh memResume Done restoring memory controllers; enable DIMMs.

E0h RestoreFromRam/chipsetInit Begin initialization process.

E1h chipsetInit Start of a single loop iteration.

E2h chipsetInit End of a single loop iteration.

E8h chipsetInit/LPCBusInit LPC Bridge initialization.

EAh chipsetInit/GPIOInit GPIOs initialization.

2Ch chipsetInit/ConfigBaseAddr Configuration base address is invalid. HLT.

2Dh chipsetInit/Id_CPU Invalid crystal in use. HLT.

B1h RestoreFromRam/GoToSleep Enter S3V (take memory out of self-refresh, put CPU to sleep).

AFh GoToSleep Interrupts cleared; setting 1 sec. RTC alarm.

A3h GoToSleep Alarm set; generate and clear SMI so CPU will Suspend.

BDh RestoreFromRam Check for memory restore.

B2h RestoreFromRam Memory is on; set Bus Interface Unit registers to known.

B3h RestoreFromRam Running from RAM; setup a temporary stack.

D4h RestoreFromRam/IcdInit Initialize LCD panel and DSTN controller, setup scratch pad, clear SMI regis-

ters.

B4h RestoreFromRam Should not execute - software should be in SMM.

BFh RestoreFromRam Cause software SMI (resume to SMM).

84h RestoreFromRam Should not execute - software should be in SMM.

83h RestoreFromRam Should not execute - software should be in SMM.

03h --- startTest/unReal Precedes creating a 32-bit real mode descriptors in ES and FS.

04h --- startTest/cpuMemRegInit Initializes memory controller registers.

05h --- startTest/clockInit Geode CPU tests.

20h clockInit Test entry.

28h clockInit Verify CPU stepping ID.

2Ah clockInit Verify CPU feature flags.

2Eh clockInit Test passed. Exit.

2Fh clockInit Test failed. HLT.

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Code Function Name Function Description